Electrical accumulator.



Patented0ct.20,1908.

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O O O O O O 000 MO 6 g ATTORNEY UNITED STATES PATENT OFFICE.

CHARLES BUSGH, OF NEW YORK, N. Y.

ELECTRICAL ACGUMULATOR.

Specification-of Letters Patent.

Patented Oct. 20, 1908.

Application filed July 15, 1908. Serial No, 443,644.

To all whom it may concern:

Be it known that I, CHARLES Boson, a citizen of the United States,residing in the city of New York, county of New York, and State of NewYork, have invented certain new and useful Improvements in ElectricalAccumulators, of which the following is a specification.

My invention in electrical accumulators, relates to certain new anduseful-improvements in the mechanical details and the construction andformation of the'elements of lead accumulators and the object thereof isto provide means for insuring durability of the elements of which theactive portion of the accumulator is composed and to provide for economyand efficiency in the operation and maintenance thereof. I attain theseob-. jects by the construction as illustrated in the drawings heretoattached in which,

Figure 1 is a side elevational view of one of my improved elements witha, portion of the incasement or envelop broken away to elucidate theinterior construction. Fig. 2 is ,a cross sectional enlarged fragmentaryview, taken on the lines 22 of Fig. 1, and Fig. 3 is a similar viewtaken on the lines 3-3 of Fig. 1.

- In the several views similar characters of reference are. employed todesignate like parts throughout, wherein, a.

A depicts a grid composed of,,'lead which is provided with a terminallug l secured. to the grid A by riveting or by the well known process ofburning. The grid A I prefer to make of rolled sheet lead of suchthickness aswill be commensurate with rigidity for a given area, as forexample in the illustration Fig. 1, the grid A may have a thickness ofof an inch which when stiffened by the numerous perforations about to bedescribed will be sufficiently rigid for a grid of the dimension shown.The grid A is formed by the erforations a, 1' in parallel rows and in t1e general formation with respect-t0, each other as illustrated in Figs.

row by a punching operation so as to throw a bin.- on the opposite side,thus leaving a neck 3, which I shall hereinafter refer to as an anchor.The rows of erforations 1 have -rial. referred to is indicated at B andas will be observed is anchored by the necks 3 and 4 at opposite sidesof the grid A. The pasted grid thus formed either for an anode orcathode, element of an accumulator cell" .is placai iii-a perforatedenvelop preferably the perforations 1 and 2 1 was, -The perforations aare all formed 'in choli nccks 4 which are simi arly formed but on .nineof these are shown for each of the secof hard rubber composed of thesections 1 and 2 The sections 1 and 2 have beaded frames 6 and 1respectively, and are matched to engage each other as will be clear bythe illustrations Figs. 1 and 2. These'two sections form substantiallyan envelop or casing for the pasted grid A, and the sections 1 and 2 areeach perforated to afford circulation of electrolyte around the surfaceof the grid A. These perforations are referred to at C and 1. Theperfora tions C and 1 are of smaller diameter than and are arrangedcoaxial therewith when the grid A is assembled in the casing 1 and 2 Itwill be, observed that inasmuch as that the' erforations C and 1 in thecasing a'r'e smal er than the perforations a and 1 in the grid A, theactive material contained in the grid will be further anchored by thewalls of the casing 1 and 2 The sections 1 and 2 of the casing areprovided with center-in studs D and 1 in the instance illustrated tions1 and 2 These are constructed as terstices between the necks 3 and 4 andin -the perforations a and 1. The active mateillustrated in Fig. 3, and.are adapted to center the grid A.

-- Prior to the hardening of the pasteiin the grid A the latter isplaced upon the centering studs D of the section 1 and pressed downuntil the active material is penetrated on one side and the leaden sheetrests there on. Next the section 2 is applied in a man- E. This lacingis passed -t ner so as to envelop the grid A. In the meanwhile, thecentering studs I will have penetrated the upper surface of the grid Aprecisely as just described, and the said grid will be centered in' thecasing. The next operation in forming my accumulator element is tosecure thesections 1 and 2 and the grid A yieldingly together and toaccomplish this I string or lace the said three members together bypreferably rubber elastic which I string through alternate perforationsin the form ofa lacin as illustrated at irough the paste andperforations in the grid A such a manner as to leave alternateperforations in the same parallel row with a lacing and the nextperforation without a lacing. The said lacing is also carried throughthe hard rubber sections 1 and 2 of the casing as illustrated in Figs. 1and 2. It. will be observed in --Fig. .2 that the lacing in theperforations is so arranged as to admit of free circulation through theelement in order that the rubber lacing will be sufficientlyunobstructive to block theentire passage way.

'In order to enhance the circulation of electrolyte about the grid A, Iprovide a number of end erforations F, which intercepts the matc'heportions of the'af'rame b and 1".

It will be clear to those .who are familiar with the action ofaccumulator elements of I the character. to which my invention relatesthat during the charging operation the active material upon the elementsexpands .-;somewhat and upon discharging contracts, theeffect of whichis to. loosen the active ma terial from its support which .is one oftheprincipal drawbacks in the operation of lead accumulators. Theloosening of the active down of the cell.

material from its support in accumulators of this character occaslons raid disintegration of the elements and fina ly the -breaking In theprocess of charging and 'd-ischar ing the active material is usuallyreceded by an electrochemical ess-of su fatin and the sulfating is ruced finally to oxidation. In theevent of loose contact between'theactive materialand its support sulfating is more or lesspermanent and acertain percentage ofthe active inaterialin lieu of being reduced to anoxid is'retained-in the form ofPBSO By the novel construction of myelement wherein Z the sections of the. envelop B and 1 are tion isyieldingly applied to the grid Aintimate electrical contact is at alltunes-maintained between the active in terialand its sup ort. Upon thecharging d} the ele ment an expansion of the antive-matrial thereof, thelacin the] rubber lacing E is continua y increasing as the ettinghigher, and lie to the in- Yolute' ormof lacing between the intersficesand the paste surface great. pressure maintain the section the.

de ree of ovida--.

is had at all times between the active materialand its support.

I am aware that previous to my invention it has been customary to bindthe several elements .of an accumulator cell together by elastic bands,the object of which however does not fall within the scope of my inven-'tion, and I therefore do not claim such means of maintainin the elementsin contact as my invention,%ut

I do claim however and desire to secure. by Letters Patent of the U. S.

1. In an electrical accumulator element, a perforated electrode, a paste.upon the surace of the electrode, a sectional casing for the electrode,perforations in the casing and an elastic binder strung through theperforations of'the casing and the perforations of the electrode tomaintain the sections in con-- tact with the electrode.

2. In an electrical accumulator element, an electrode, perforationsinthe electrode, bjurs formed around .the perforations alternately activeon opposite sides of the electrode, the material carried by theelectrodeand an chored by'the'said burs to the said electrode,

a sectional casing for the electrode, perforations in the casing and anelastic lacing v strung through the erforations of the- 'casing and theperforai' ons of the electrode to of-the active material incontact withthe electrode 3. In an ele'ctrical accumulator element,ian

electrode, perforations in the electrode, burs formed aroifndt-herperforations alternately on o posite sides of the electrode, activema- -teria carried by the electrode and anchored byjhe said burs to thesaid electrode, -a sectional casing for the electrode provided withcentering lstuds, perforations 1n the casing and an elastic lacingstrung through the perforations of the casing and the perforations ofthe electrode to maintain the sections in-contact withthe electrode. 4.In an electrical accumulator element,

an insulating envelo pair of laterally adiustable perforated {in};

sulatin separators each being provided with a marginal frame and adaptedto match each other and an elastic laicingstrriiig'ihwardly between thetwo.

-5. In. an electrical accumulator element, an insulatlng envelo orcasing comprising su ating separators each being provided with amarginal perforated frame and adapted to 'match'each other and anelastic lacing ear ried by each' and strung inwardly between the two andads ted to pull them together between the er orations.-

. 6. In an 'e ectrical accumulator element, an insulating envelo 'orcasing comprising a air of laterally a justable perforated-im suatingseparators, provided with inwardlyor casing comprising' 1 10 a airof laterally a justable perforated instant-ial y as described.

projectin centering studs, each being pro- In testimony whereof, I havesigned my vided Wit a marginal end perforated frame name to thisspecification in the presence bf and adapted to match each other and antwo Subscribing witnesses. V r elastic lacing carried by each and strungin-- CHARLES BUSCH. wardly between the two and adapted to pullWitnesses: them to ether between the perforations, sub- MARKUS HANSEN,

C. E. MULREANY.

